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34kurt
3 years ago
11

You are recently promoted as the chief traffic management officer of a major city in the country. Based on recent data, you lear

ned that one of the leading causes of road accidents is over speeding.
In your desire to minimize road accidents, you went out to observe how traffic management rules are implemented on the streets. Your attention was caught by a fast - moving car that seemed to be breaking the speed limit of 100 kilometers per hour(km/hr.), and so you followed it along the highway. After a short time, the driver of the car noticed you and started to slow down. Eventually, he stopped on the side of the road.

Supposed the speed of the car had been noted during this time and is modeled by the quadratic equation y = 3x² + 17x - 20, where y represents the speed of the car in km/hr. and x represents the number of minutes after you started following the car. How long did it take for the car to be under surveillance before it could finally stop on the side of the road? Did the driver of the car really break the speed limit of 100 km/hr.? Explain. The result of your observation will be presented to the students in your section and will be graded by your teacher.
Mathematics
1 answer:
hram777 [196]3 years ago
6 0

Step-by-step explanation:

<h2>3(100)2 + 17(100) - 20</h2>

3(10000) + 1700 - 20

30000 + 1700 - 20

31680

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mixas84 [53]

Answer:

86+18\sqrt{2}

Step-by-step explanation:

Use the properties of 45-45-90 triangles to get a side length of 18 for the 2 legs of the isosceles triangle. Then add 43+18, which is the shorter length of the rectangle, +25, which is the longer edge, +18\sqrt{2}. The answer is now 86+18\sqrt{2}.

3 0
3 years ago
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WILL MARK BRAINLIEST PLS HELP
Wittaler [7]

Answer:

209.96

Step-by-step explanation:

we know that the circumference of the circle is equal to

C = \pi D

we have

D = 64 ft

substitute would be

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3 years ago
Question:
Genrish500 [490]

Answer:

x=56 and the exterior angle is 116

Step-by-step explanation:

We will call the unknown angle in the triangle y.  Angle y and the angle (2x +4) form a straight line so they make 180 degrees.

y + 2x+4 =180

Solve for y by subtracting 2x+4 from each side.

y + 2x+4 - (2x+4) =180 - (2x+4)

y = 180-2x-4

y = 176-2x


The three angles of a triangle add to 180 degrees

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Combine like terms

-x +236=180

Subtract 236 from each side

-x+236-236 = 180-236

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Multiply each side by -1

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The exterior angle is 2x+4.  Substitute x=56 into the equation.

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8 0
4 years ago
A function is defined as {(0,1),(2,3),(5,8),(7,2)}. Issac is asked to create one more ordered pair for the function. Which order
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4) (1,3)
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4 0
3 years ago
F (x) = 1/3 x for x=4
DENIUS [597]

Answer:

4/3

Step-by-step explanation:

Substitute in 4.

(1/3)4

Multiply

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I hope this helps!

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3 years ago
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